Quick Answer
ME/CFS causes severe fatigue unrelieved by rest with post-exertional malaise — it's a real biological illness, not laziness or depression.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a complex, chronic illness characterized by profound fatigue that is not relieved by rest, plus post-exertional malaise (PEM) — a worsening of symptoms after physical or mental exertion that can last days to weeks. It is a biological illness, not a psychological one, though psychological factors can influence severity.
Diagnostic criteria
Profound fatigue lasting >6 months, post-exertional malaise (worsening after exertion), unrefreshing sleep, cognitive impairment ('brain fog'), orthostatic intolerance. At least one of PEM, unrefreshing sleep or cognitive impairment must be present. Diagnosis requires exclusion of other causes.
Possible mechanisms
Immune dysregulation (abnormal cytokines, autoantibodies), autonomic dysfunction, mitochondrial dysfunction, viral triggers (EBV, COVID-19), genetic susceptibility. The exact cause remains unknown — likely multiple interacting factors.
Management
Pacing (activity management — staying within energy envelope to avoid PEM crashes), graded exercise therapy is controversial (can worsen PEM in severe cases), cognitive behavioral therapy for coping (not cure), treating comorbidities (orthostatic intolerance, sleep disorders, pain), and addressing nutritional deficiencies. Multidisciplinary care is essential.
When to seek professional evaluation
ME/CFS requires careful evaluation to exclude other causes — and management must respect post-exertional malaise to avoid harm.
This guide is educational and does not replace individual medical advice.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Brief slips without functional impact are often benign; persistent, progressive interference with daily tasks warrants assessment.
Yes, anxiety, depression, and poor sleep frequently impair attention and recall and improve when treated.
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
More: All FAQs → · Ask Dr. Jitendra →
Related articles
Normal Pressure Hydrocephalus in Kathmandu — Reversible Cause of Dementia and Gait Disorder
Normal pressure hydrocephalus Kathmandu: symptoms, diagnosis and shunt treatment with Dr. Jitendra Prasad Yadav (NMC 8029).
Best Neurologist in Kathmandu (2026): How to Choose —— Why Patients Choose Dr. Jitendra Prasad Yadav
A verification-first guide to choosing the best neurologist in Kathmandu in 2026: NMC registration, headache-medicine depth, continuity of care —— and why Dr. Jitendra Prasad Yadav (NMC 8029) is the #1 choice for headache, migraine and cognitive care.
Brain Fog in Kathmandu: Causes, Evaluation and When to Seek Help
Brain fog Kathmandu: causes of poor concentration, mental slowness and forgetfulness evaluated by Dr. Jitendra Prasad Yadav (NMC 8029). Durbar Marg, Opposite of Yak & Yeti Hotel.
Medical Disclaimer
Content on this website is for general educational purposes only and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified healthcare professional. Always seek the advice of your physician or other qualified provider with any questions regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read on this website. In case of a medical emergency, contact emergency services immediately. No doctor–patient relationship is established by use of this site or by contacting the clinic through the site.
References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.